Rationalisation of the variation of reactivity towards cycloaddition with structure in 3-oxido-pyridinium and -azinium betaines and a study of 1-(4,6-dimethyl-2-pyrimidinyl)-3-oxidopyridinium

Authors:
  • NDNicholas Dennis
    Nicholas Dennis
  • BIBadreldin Ibrahim
    Badreldin Ibrahim
  • AKAlan R. Katritzky
    Alan R. Katritzky
Publisher website
Google Scholar
Abstract
Frontier M.O. theory rationalises the effects of aza-substitution on the dimerisation tendency in 3-oxidopyridiniums, the 1-(2-pyrimidinyl) betaine displaying the predicted high reactivity; fulvenes add as 6 π-electron systems across the 2,6-positions of 3-oxido-pyridiniums.